Domain Overview
DNS: ✓ 2mo ago
Checker: ✓ 2mo ago
feil-systeme.de
Yes
✓ Yes
Outlook
No
No
⚠ Yes
No
No
Checked via [email protected]
· 2026-04-04 20:22:38 UTC · ↺ Refresh
MX Hostnames
- feilsysteme-de01b.mail.protection.outlook.com
MX Priorities
- feilsysteme-de01b.mail.protection.outlook.com: 10
A / AAAA Records
- 185.175.196.121 (no PTR)
- 2a00:1c98:60:1160::8ce5:7341 (no PTR)
Mail Server IPs
- 52.101.73.12 ↩ mail-am4pr0401cu00104.inbound.protection.outlook.com
- 52.101.73.15 ↩ mail-am9pr04cu00107.inbound.protection.outlook.com
- 52.101.68.10 ↩ mail-dbbpr03cu00102.inbound.protection.outlook.com
- 52.101.68.27 ↩ mail-db7pr03cu00503.inbound.protection.outlook.com
- 2a01:111:f403:ca09::f ↩ mail-am7pr05cu00307.inbound.protection.outlook.com
- 2a01:111:f403:ca04::a ↩ mail-du0pr03cu00102.inbound.protection.outlook.com
- 2a01:111:f403:ca04::1 ↩ mail-db7pr03cu00401.inbound.protection.outlook.com
- 2a01:111:f403:ca09::b ↩ mail-am7pr05cu00103.inbound.protection.outlook.com
SOA Record
Raw SOA
docks20.rzone.de hostmaster.strato-rz.de 2020071122 86400 7200 604800 300
Primary NS (mname)
docks20.rzone.de
Admin Email (rname)
hostmaster@strato-rz.de
Serial
2020071122
Refresh
86400s
Retry
7200s
Expire
604800s
Minimum TTL
300s
Nameservers (NS)
docks20.rzone.de
shades05.rzone.de
SPF Record
✓ Soft Fail (~all)
v=spf1 ip4:212.72.182.112 ip4:87.190.24.184/29 include:spf.protection.outlook.com include:spf.emailsignatures365.com include:mail01.feil.eu ~all
📊 DNS lookups: 3/10
~ Soft fail (~all) — moderate enforcement
DMARC Record
✓ Reject
v=DMARC1;p=reject;
✓ Reject — strongest protection
📋 SPF alignment: Relaxed
· DKIM alignment: Relaxed
⚠ No aggregate reports (rua= not set)
DKIM Selectors
✓ 2 found
selector1._domainkey
selector2._domainkey
✓ Public key: 392 chars (valid)
✓ DKIM properly configured for selector: selector1
Checked: google, selector1/2, default, mail, dkim, k1, s1/2, zoho, sendgrid, mxvault, amazonses
All TXT Records
2 records- google-site-verification=PDZbF7SVUa0N6xb3FPKNQdBR84ZVIR9ARRwyYNc5Xls
- SPFv=spf1 ip4:212.72.182.112 ip4:87.190.24.184/29 include:spf.protection.outlook.com include:spf.emailsignatures365.com include:mail01.feil.eu ~all
Free · No signup required
Add email validation to your forms
Block disposable emails, validate MX records, detect role accounts — unlimited, forever free.
<script src="https://check.verifyswift.com/"></script>
One line of code · Works on any site
See demo & docs
Deep verification
Full email verification for feil-systeme.de
SMTP handshake, catch-all detection, custom validation rules, actual deliverability tests, and more.
No credit card required
Get 1,000 Free Credits